FABP4 and neoplasm: WB indicated that the expression levels of PPARγ and FABP4 in xenograft tumor tissues from HEY and MDA-MB-231 control cells and PDCs after adipogenic differentiation were higher than those in cells before adipogenic differentiation (Figure 7K), and the differences were statistically significant (for HEY: control vs. control after adipogenic differentiation, P < 0.0001; PDCs vs. PDCs after adipogenic differentiation P < 0.0001; for MDA-MB-231: control vs. control after adipogenic differentiation, P = 0.0028; PDCs vs. PDCs after adipogenic differentiation P = 0.0064) (Figure 7L).